Rocker side bearing



July 28, 1936 J.' F. HoLLowAY HOOKER SIDE BEARING Filed Aug. 25, 1934 INVENTOR Jessz F'. Hd oway Patented July 28, 1936 itvr vvention is to 'provide a .ating gravity .aligning side bearing rockers so con- ROCKER SIDE BEARiUTG` Jesse F. Holloway, Aidan, Pa. Application August 25, 1934, Serial No. 741,359

s Claims. (c1. sns-224) This invention relates generally to railway trucks and more particularly to'improved rocker sidebearings. Y. One object of Vmy invention is to provide an mproved. rocker side bearing having bearing pockets von each side of a center plate to receive a pair :ofnimproved coacting gravity aligning rockers -Whichcarry the entire weight of the spring porftion load of Y therailway vehicle whether it is an Yelectric locomotive or a passenger car or freight A further and more specic object of the inpair of improved cooperstructed and arranged that said rockers are always biased toward self-contained counteracting relation,thereby causing the rockers to maintain their normal relation at all times even though the weight is temporarily lifted from the rockers such as wherrthe railway vehicle .travels Iaround -a curve or'is otherwise caused to sway temporarily :by centrifugal action.

Other objects and advantages will be more apparent to `.those-skilled in the art from the following .description of the accompanying'clrawing in :which:

Fig. 1 is a fragmentary vertical transverse sec- Ition'of a vehicle frame and the bolster and center pin arrangement;

Fig. 2 isa vertical longitudinal section taken on "the line 2 2-of FigVl;

f-Fig'. 3 is aperspective of one -oi the cooperating rockers; 3 Y

Y i" Fig. 4 is a perspective of the vtop of the liner for the rockers; Y

Fig. 5-isy a perspective ofthe lower linerfor the rockers. A

-In'.tlie-il1ustrated embodiment of my invention which is shown herein merely for the purpose of disclosing one specific form among possible others that the invention might take in practice, I have applied the invention to a center pin construction of the type disclosed in the joint patent of Harry Glaenzer and Allen Wallace, Patent Number 2,038,560, issued April 28, 1936, although it will of course be understood that the invention is applicable to other types of center pin constructions. A locomotive frame generally indicated at I has a center pin 2 projecting downwardly for engagement with a truck bolster 3, it being noted that a housing 4 extends upwardly from the bolster to provide not only an ample axial bearing for center pin 2 but also to support an equalizing spring carriage 5. The truck bolster as is usual is adapted to swing about the center pin 2. Other locomotive mitted through spring .tween the liners II and I3.

.portion I6 and vupper amount of rweight than .support .the spring rigging including springs 6,

the spring rigging being suitably attached to the frame I. The weight is thus trans- 6 to the equalizing spring transmitted to the bolster 3'through my improved rocker side bearings gen- The weight of frame I 1s not in any way transmitted through the center pin 2, this pin merely serving a centering funcsuch elements would vbe associated with the truck and bolster.

tion. The pin permits relative vertical movement between the truck bolster 3 and spring carriage 5.

The side rocker Ybearings are identical and hence the description of one will suffice for both. As shown in Fig. 2, the spring carriage is provided witha suitable recess 8 having lateral openings 9, the truck bolster also being provided with .a suitable bearing recess .|0. A top liner II is welded orY otherwise carriage, and thsliner as shown in Figs. 2 and 4 has down-turned ends I2. A-bottom liner I3 is inserted in recess l0. A pair of cooperating selfcentering rockers I4 and I5 is `interposed be- .The two rockers are identical, and `hence the description of one will suiiice 'for both. As shownin Fig. 3, the rocker-*comprises a center and lower'lateral portions I1 on the outside and upper and lower lateral portions I8 on the inside. The portions I8 project laterally vto-a greater extent and with a greater thel lateral portion I1, thus creating a preponderance of weight on the inner side `with respect to the center v4I9 about which the radii of the two bearing surfaces and 2| are struck. While these radii are thus identical and struck from the same center, it will of course bearing surfaces 20 and 2| may have any desired curvature. 'I'he inner faces 23 of the lateral portions I8 constitute coacting or aligning surfaces for the rockers when positioned between the bearing liners II and I3 shown in Fig. 2. These inner faces are of sufcient height to prevent locking one with the other at the extreme limits of travel of the rockers such as when the locomotive or car is negotiating curves.

aligning surfaces 23 in contact, or substantially vertical plane. The

weight to the truck 2rv outermost corners of the lateral portions l1 will be relatively close to the down-turned edges I2 of the upper liner Il and to the side walls of the bolster recess I0. Assuming now that the railway vehicle is travelling around a curve, then bolster 3 rotates about center pin 2, thus causing rockers I6 to rock about their curved bearing surfaces 20 and 2|. The longitudinal axes of these rockers are then inclined but remain parallel to each other, and the aligning surfaces 23 maintain contact 4with each other. As the vehicle comes on to the straight portion of the track, the truck bolster rotates to its normal position, and the rockers assume the position shown in Fig. 2. If for any reason, one side of the spring carriage 5 should lift, ever so slightly, upwardly away from the truck bolster so as Ving to swing each of therockers inwardly toward each other. Hence when the weight of the car `is again applied to the rockers, they will be in their normal relation to transmit the full load.

If the weight should be momentarily lifted from the rockers while travelling around a curve,.at which time the rockers are inclined away from the vertical, still the rockers are maintained in contacting relation with each other without any possibility of swinging back to a vertical plane, this being due to the down-turned edgesV l2 or the walls of recess Il] engaging the upper outer corners of lateral portion l1. During this or other times, the aligning faces may separate, but this would be only slightly and would not prevent the weight- Ved portionsY I8 from functioning to restore or maintain the rockers in parallel relation.v

Fromthe foregoing disclosure it is seen that I have provided an extremely simpleand yet highly effective rocker bearing 'to carry and transmit the bolster and at the same time insure proper relation between the cooperating rockersfirrespective of whether the railway vehicle is travelling around a curve or on a straight track or whether the weight is momentarily lifted from one or the other of the two. sets of rockers during either of the foregoing directions of travel.

It is Valsoseen that the rockers.. are easily formed to insure `their gravity self-alignment and` that while each of the rockers might be termed broad- .ly as having an,eccentricallyvlweighted I-,section Aconstruction and thatthe rockers` are identical,

yet thek rockers might take various other forms y principle herein disclosedtogether with Vother features as set forth.

- 1t will of'coursebe understood that various ing,

.a pair of substantially identical rockers interto momentarily relieve the weight on rockers l6,.still these rockers' V.Weighted DOIOHS .OI'

acting surfaces being changes in details of construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as set forth in the appended claims.

I claim: y

1. A side bearing for railway vehicles comprising, in combination, a pair of opposed seats, and a pair of rockers interposed between said seats and having coacting surfaces and eccentrically weighted portions for biasing said rockers into said coacting engagement, said coacting surfaces bein-g formed on said eccentric portions.

2. A side bearing for railway vehicles compris- Y in combination, a pair of opposed seats, and

posed between said seats and having mutually aligning coacting surfaces and eccentrically biasing said rockers into with each other, said coforrned on said eccentric cocating engagement portions. v

, 3. A side'bearin-g for railway vehicles'comprising, in combination, a pair of opposedv seatsgand a pair of substantially identical rockers interposed between said seats and having mutually aligning coacting surfaces and eccentrically weighted portions for biasing said rockersinto coacting engagement with each other, Asaid coactingV surfaces beingformed on said eccentric portions, said rockers having kupper and lower curved surfaces of substantially thesame radii andY engagingsaidseats. Y, f Y 4. A side bearing for ,railway vehiclescomprising, in combination, a pairjof opposed seats,

.and a pair ofV substantially identical rockers interposed between saidseatsand having mutually aligning .coacting surfaces Y and eccentrically weighted portions for biasing said rockers intov coacting engagement with eachother, said coacting surfaces being Vformedon said eccentricportions, said rockers having upper and lower surfaces of substantially the same radii about the Ysamecenter and engagingsaid seats.

5. A side bearing for railway vehicles compris-` ing, in combination, Y a pair of cooperating rockers interposed between saidseats, A.one of said rockers beingV substana pair of opposed seats, and

tially an I-section with one of its inner angesV eccentrically weighted. e r

6. A side vbearing for railway vehicles comprising, in combination, a pair of opposed seats, and

a pair of cooperating rockers interposed between said seats, said Vrockers Vbeing of substantially I-section and having eccentricallyweighted jportions on the sides adjacent each otherwhereby their upper ends gravitate toward eachiother- Y Jnssn E. HoLLowAY.

enf 

